void Shift( char s[] )
{
    char temp[4]; 
    temp[0] = s[0];
    temp[1] = s[1];
    temp[2] = s[2];
    temp[3] = '\0';

    int len = 0;
    while (s[len] != '\0') len++;

    for (int i = 0; i < len - 3; i++) {
        s[i] = s[i + 3]; 
    }

    s[len - 3] = temp[0];
    s[len - 2] = temp[1];
    s[len - 1] = temp[2];
    s[len] = '\0'; 
}
